1 files changed, 46 insertions, 0 deletions
diff --git a/chromium/third_party/blink/renderer/core/loader/subresource_redirect_util.h b/chromium/third_party/blink/renderer/core/loader/subresource_redirect_util.h
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index 00000000000..6957284b934
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+++ b/chromium/third_party/blink/renderer/core/loader/subresource_redirect_util.h
@@ -0,0 +1,46 @@
+// Copyright 2021 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_LOADER_SUBRESOURCE_REDIRECT_UTIL_H_
+#define THIRD_PARTY_BLINK_RENDERER_CORE_LOADER_SUBRESOURCE_REDIRECT_UTIL_H_
+
+#include "third_party/blink/renderer/core/html/html_image_element.h"
+#include "third_party/blink/renderer/platform/weborigin/kurl.h"
+
+namespace blink {
+
+// Enumerates the different ineligibility reasons for why a subresource
+// redirection was disabled in blink. This is recorded in metrics and should not
+// be reordered or removed. Should be in sync with the same name in enums.xml
+enum class BlinkSubresourceRedirectIneligibility {
+  // Created by javascript and is same-origin with the document.
+  kJavascriptCreatedSameOrigin = 0,
+
+  // Created by javascript and is cross-origin with the document.
+  kJavascriptCreatedCrossOrigin = 1,
+
+  // Restricted by Content-Security-Policy default-src directive.
+  kContentSecurityPolicyDefaultSrcRestricted = 2,
+
+  // Restricted by Content-Security-Policy img-src directive.
+  kContentSecurityPolicyImgSrcRestricted = 3,
+
+  // Crossorigin attribute was set which indicates CORS validation will happen
+  // for the subresource.
+  kCrossOriginAttributeSet = 4,
+
+  // New enum entries should be added here.
+
+  kMaxValue = kCrossOriginAttributeSet
+};
+
+// Returns whether subresource redirect can be attempted for fetching the image
+// with |url|. Redirect to other origins could be disabled due to CSP or CORS
+// restrictions.
+bool ShouldEnableSubresourceRedirect(HTMLImageElement* image_element,
+                                     const KURL& url);
+
+}  // namespace blink
+
+#endif  // THIRD_PARTY_BLINK_RENDERER_CORE_LOADER_SUBRESOURCE_REDIRECT_UTIL_H_